The powder coated surface should be delicate, full, transparent, strong in three-dimensional sense, and can maintain relative luster for a long time. The decorative surface coating is at least 40um. The poor appearance is dim, the stereoscopic effect is poor, and after a period of time, there is light loss, powdering, paint stripping, etc. Slight orange peel on the surface of powder coated profiles is accepted. There are almost no orange peels on high-quality powder coated profiles, but the orange peel on the surface of poor powder coated profiles is obvious and serious. The reason is the use of poor quality powder coatings, or the production process and production management are not strict.
Another benefit of aluminum window extrusion profiles is their sleek and modern look. The slim frames of aluminum windows allow for larger panes of glass, maximizing natural light and views from inside the home. Additionally, aluminum frames can be designed with clean lines and sharp angles, creating a contemporary and minimalist aesthetic that is popular in modern architecture.
aluminum window extrusion profiles

Cast iron is vulnerable to rusting if it does not have a protective coating of carbonized oil, a process known as seasoning.
A last and even more important, additional advantage of polyamide is the excellent thermal insulation. While aluminium scores much less well than wood and PVC in that area, it performs at least as well in terms of Uf value thanks to the polyamide strips (which insulate 500x better than aluminium).
7 Items to Consider When Buying Wrought Iron Fence and Gates
There are several tips for you in selecting a high-quality aluminium window. First and foremost, the thickness of aluminium profiles of the aluminium windows should not be less than 1.2mm. Tempered glass or laminated glass are also better than float glass. If you consider the safety and durability of the windows, choose stainless steel hardware accessories (such as screws, hinges, handles, etc.) It is also advisable to choose pulley that is made of POM material. These products have higher strength and abrasion resistance. They are smooth during operation and not easily damaged.